KoolKat™ Katusra Tree, Cercidiphyllum japonicum 'KoolDak' (RFM-81)
This is a cold-hardy selection of Cercidiphyllum japonicum that has survived without damage in USDA climatic zone 3a at -37 degrees F. Foliage goes through an amazing seasonal color change from bronzy spring emergence, bluish-green in the summer to yellow/apricot in the fall. This selection is unique in that it has early fall dormancy as compared to the species, assisting with increasing the winter hardiness.
USDA hardiness zone 3b - 8
Height: 35 - 40' Spread: 20 - 25'
Pyramidal when young, opening canopy with age
Medium to fast
Deciduous, bronze when expanding in spring.
Summer: Bluish-green. Autumn: Yellow to apricot-orange
Dioecious, female flowers only. Red but not ornamental.
Small (1/2" long) persistent banana-shaped pods
Full sun to light shade
Performs best in well-drained soil and is tolerant of higher pH soils without chlorosis.
Stem cuttings or micropropagation
Heart (cordate) shaped leaves emerging reddish-purple in the spring, changing to blue-green as they mature for summer. In autumn, fall color will be yellow to apricot in color depending on the year with delightful cinnamon odor when senescing.
pH adaptable. Recommended for use as a landscape, boulevard, parks and golf course tree.
This selection adds diversity to the colder climate landscape. Supplemental water suggested during establishment and drought.
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